Toggle c. clamp



Aug. 3, 1943. o, M. KIRLIN TOGGLE C CLAMP Fi ked March 5, 1941 2Sheets-Sheet 1 fzjszacis New " jpplioation Mar-chi,

V Q I p (cum-cos) "The present inventionrelates;to the art-ol' ad-ijustable clamps 1 in general and provides a ue= vice -of this characterwhereby "anydesired adjustment 01' the same may be very speedilyaccompiished without-disturbingthe "arrangement of parts in the clampingprocess while the same are being machined. V '-Whil -this clamppossesses almost unlimited use, it is particularly-adapted for arc orgas welding-operations; i '9 In meow type 000 -'clam'p*wherein thethroat member 'is providedwith an elongated-screwihav 'lnga pivotal shoeuponthe lower-end thereof, the rotating of the-screw, lntightening tendsto-disturb theposition of-clampedparts, and with this type; of clamp andparticularly in weiamgbp ra- V tions, it 'is common for splashingof hotmetal to become embedded within the threads of the screw thus making itinoperative, and it is usually impossible to remove this splashed metalfrom the screw.

' stood herewith that all portions oftthe device 1 beingassociatedtherewithandnota part there 7 of will :be :designated byi consecutive'lyarranged alphabetical letters, while the invention properf numerals;

,In' the toggle C clamp herein disclosed,it is more easily to operateandto accuratelyretain r the clamped objects in their proper relativeposition at all times, the toggle and rack serving as arapid meansi'or'variable adjustment, andthe tightening of the clamp does nottendtovdistur b the position of the clamped parts; and any splashed hotmetal rinding or filing.

With the foregoing in mind, it will become vreadily apparent that theinvention possesses further advantages; all of which will become readilyapparent during the course of theiollowing'detailed description,illustrated throughout the accompanying drawings, and more fully pointed'out'in the appended claims. With reference to the drawings: i

Figure 1 is aside elevation of the complete 4 Iwhen the clamp istightened by the screwing clamp showing the same beingadjusted to arelatively thin piece of metal; and Figure 2 is a similar view showingthe clamp being 7 adjusted to objects or decidedly greater thickness.Figure 331s an enlarged sectional view exposing the toggle mechanism,and in normal position;

maybe easily removed by lower portion of the rack; the iwithinlsaid rackrbeing clearly visible; I

finlcarryingout my invention, let-it be underwill'.-he;characterlzed bythe customary reference In further carrying-cutrny invention I employ Cclamp frame A, and referring more partlcu-' larly'ito Figures 3 and 4 itisiseen that theupper portionoi: said frame is enlarged as at "-B, andhaving pocket I' therein, so as to accommodate the tree actionoi*-oneendportion of link 2,

while the-o pposite-end portion or said-link" being similarly disposedimpeach! cram 4, said l as ati, andbelng likewise pivoted to arm 4 as atReferring now to Figures 1 to 4 inclusive, it is observed that rack 1 isprovided, and that by virtue of the toggle mechanism and the slidablemotion of rack 1 quick or instant adjust ment is made with this clampwhereas in the old a .type of c clamp wherein the screw'is used/bychanging the adjustment of this type, the screw must bebacked off thework in a slow manner and consistent with the time required for this'link-being pivoted to frame A Toggle screw I2 is provided and threadedly1 engages arm 4, and it is readily seen that in Figure 3 the toggle arm4 is held upon rack 1 by spring l3when the device is in a clampingposition, and in Figure 4 it is very clear how the,

toggle is pulled over so as to and thereby releasing the same.

disengage rack l Toggle screw I 2 contacts at its lower enda concaveportion of frame A, this concave portion tending to force and retain theother-end of arm 4 into proper and accurate engagement with rack down oftoggle screw l2.

and Figure 4 is a similar view showing the toggle mechanism disengagedfrom the rack.

Figure 5 is an enlarged sectional view taken upon line 55 of Figure 1. lt

Figure 61s on enlargedbottom view of athe j 881c member..

Figure 7 is an enlargedsection taken upon" 7 line ll-I of Figure 2.

Figure gig a sectiono f the rack"shoeand Shoe 9 is loosely attached tothe end of rack 1 to permit of its more accurate contact with thesurface of parts clamped. Q

In conclusion, let it be understood that the 1 complete disclosureherewith is merely illustrative of the general principle of theinvention sought to' be protected by Letters Patent, and it will bereadily understood by those skilled in the art to which the samepertains that various ychangesin detail may be made to suit any par-'ticular orpeculiar requirement without departing from the spirit'of theinvention as defined in the appended claims. r I i V elongated slot 7Having thus fully described my invention, what I claim as new is: v

' 1. In a clamp, the combination with a C- shaped frame, the inner endthereof terminating in arfixed work engaging jaw, the outer opposite endbeing provided with an opening, a rack bar freely slidable through saidopening, a coasting work engaging jaw mounted on th inner end of theslidable rack bar, an arm disposed adjacent" the outer end portion ofthe frame, a link pivotally connecting the intermediate portion of thearm to the outer end portion of the frame, a locking dog formed on theinner end of the arm, and

means for normally holding the dog in looking engagement with the teethof the rack bar for locking the latter and its jaw against slidingmovement in one direction, said means comprising a leaf spring securedat oneend on the frame, the free end of said leaf spring bearing againstthe outerrside edge of the link.

,2. In a clamp, the combination with a C- shaped frame, the .innerendthereof terminating,

7 the latter andits jaw against sliding movement in one direction, saidmeans comprising a leaf spring secured at one end on the frame, the freeend of said leaf spring bearing against the outer side edge of the link,and a thumbv screwthreaded rection.

through the outer end of the arm and having its inner end bearingagainstthe adjacent portion of the frame, said thumb screw forming a handle forshifting the arm and the link away from the rack bar, and disposethelocking dog in an inoperativeposition, to permit the free slidingmovement of the rack 'bar and its jaw in either di- 3. 'In a clamp, thecombination with a C- shaped frame, the inner end thereof terminating ina work engaging-jaw, the outer opposite'end being provided with anon-circular opening, a rack bar of the same cross sectional shape asthe opening slid'able therethrough, a coacting work engaging jaw mountedon the inner end ofrthe rack, banan arm disposed adjacent the I outerendof the frame, a link pivotally connect 'ing the intermediate portionof the arm to the V outer end portion of the frame, a locking dog formedon the inner end of the farm, means for normally holding the locking dogin looking engagernent with the teethof the rack bar for locking therack bar and the jaw carried there by against sliding movement in onedirection, and a thumb screw threaded through the outer end portion ofthe arm for manually shifting the latter outwardly to disposed'thelocking dog in an inoperative'position and permit the free slidingmovement of the rack bar and its jaw in either direction, the portion ofthe frame against which the inner end of, the thumb screw normally-bearsbeing ooncaved to form a seat for said thumb screw, said thumb screwcoacting with said seat to cause the dog'to move the'rack bar into aclamping position when the thumb screw is turned in one direction. v

a OTIS M. KIRLIN.

